Internal-combustion engine.



E. RfBUR'INETT.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAY 15, 1911.

1,029,41 9, Patented June 11, 1912.

NY OH Idem Q/ W f I 2 :I A

vfollowingis a specification.

l. D sTArns PATENT OFFICE.

EVERETT IR. ,BURTNE'IT, OF SAN MATEO, 'CALIFORNIAQAESSIGNOR OF ONE-THIRD T0 ,BOBERT BOWIE AND ONE-THIRD TO'THOMAS HEYDEN'EYLDT,.BOTHE OF RED- woon CITY, CALIFORNIA.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Application fileu llay '15; 1911. Serial 110. 627495.

NETT, a citizen of "the United States, residing at San Mateo, in the county of San Mateo and State 'of California, have 'invented new and useful Improvements in Internal-Combustion Engines, of which the The object of'the present invention is to provide an internal combustion engine of very simple construction, eflicient in opera tion, and not liable to get out of order.-

In the'. accompanying drawing, Figure 1 is a vertical section, partly in side elevation, taken on the line 1 -1 of Fig. 2; Fig.2 is a similar View taken on the line 22 of Fig. 1; Fig. 3 isa detail horizontal section immediately above the upper end of the pitman of the engine.

.The crank shaft 1 of the engine, carryingthe fly wheel 2 is journaled in upper and lower boxes 3,4, of which the lower boxes 4 are screwed to the upper boxes 3, while the upper boxes. are formed integral with cross pieces 5 which extend between, and are integral with, standards 6 formed on a base plate 7. Said standards are formed at the top with a circular flange 8, to which is' bolted, as shown at 9, a circular flange 10 of an upwardly extending cylindrical intake and compression casin 11, having a water jacket 12, supplied with water by a conduit havin a water inlet 13 and a water outlet 14. Said casing is closed at the top except for a valve'seat 15, against which 1s pressed upwardly a gas inlet valve 19, said seat 15- communlcating with a pipe leading to acarbureter.

. the intake and compression chamber reci rocates vertically a piston 20 having pac ing rings 21, and formed integral with a cylinder 22, the lower edge of-which is formed with diametrally op ositepairs of depending lugs 23. connect by an apertured cross head 24 carrying at the center a pin 25. Through the aperture in said.

cross head is passed, and secured by the pin 25, the end of a pitman 26. Said pit-- man is secured by a half-box 30 to the crank 29 of the crank shaft 1.

The object of operatively connecting the lower end of the cylinder 22 with the crank shaft by means of the crosshead isto enable the cylinder 22 to reciprocate outside 'of, and in close contact with, a stationary cylindrical abutment 33, while said abut-- ment is stationarilysupported by supports 36, secured to the cross pieces 5 by screws 28.- These supports 36 for the abutment 33 are located laterally, or at a distance from 'the center of the abutment, thereby permit- 'with reference to the cylinder or'extena'on 22. Said abutmentsupports a spark plug 40, and in order to permit it to so support said spark plug, while so permitting the cylinder to freely reciprocate past said supports 36, saidsupports are arranged as shown in Fig. 3, one of them to one side of a diametral line through the center of the other. The supports 36 for the abut- PatentedJune11,1912'.

:ting the cross-head 24 to extend centrally i ment 33 are made vertical in their upper portions to permit of vertical reciprocation ofthe cylinder 22 and are extended 0bliquely in the lower portions to permit of the revolution of the crank.

16 is an exhaust port in the-wall of the cylinder 22, which is adapted to register with an exhaust port 17 in the cylinder 11.

18 is a transfer valve to permit the compressed gases to pass fromthe compression chamber to the combustion chamber.

The operation of the engine is as follows. Assuming the parts to be in the position shown in"-Fig. 2, in which the piston is at the lowest par of its stroke the compressed gases in the combustion chamber are ignited by the spark, and combustion takes place, forcing the piston upward. Then the gases, which have been previously drawn into the intake or compression chamber are compressed in said chamber.- When the piston ward stroke, the pressure of the compressed ases is sufiicient to open the transfer valve 8. The exhaust valve begins to open when this eing open to the atmospherethe pressure on the lower side of the piston' is greatly reduced thus allowing the combustible gases to flow into said combustion chamber, so that said gases ess from said compressionchamber into -t e combustion chamber, and in doing so they .drivebef'ore them the products of" the previous combustion, which .pass out through the exhaust port 16 in the cylinder 22 and then through the exhaustport 17 in the casing 11. A

as passed through three-fourths of the up:

the piston is about three-fourths up, and

to By drawing particular advantage arises, from locating Y the transfer valve 18 in the piston 20 itself, rather than in the extension 22 therefrom, because by the-above arrangement it results that the combustible mixture, transferred from the compression chamber to the com- 'bustion chamber, on entering the latter chamber flowsin a direction most effective for theexpulsion of the waste gases at the ports 16 and, 17. The imperfection of the means for expelling'the waste gases has heretofore been one of the principal objections to two-cycle engines. By locating the transfer valve in the piston, the result is ob- 5 tained that, upon-the transfer of the gases' from the'compression chamber to the ,combustion chamber, the gases, on passing said I valve, completely fill the whole of the upper portion of the combustion chamber, even to the walls thereof, and, thus expel substantially all of-the waste ses. As the piston continues upward to t e top of the cylinder, the transfer valve "is still. open, and the. compressed gases equally fill both chambers. 'This result, namely, that the transference of combustible gases takes. place during the whole of the upward movement of the piston, after said upward move-' ment has" been continued sufficiently to comress the asesto open the valve 18, results ikewise m the fact that the transfer Valve is located in the piston itself. Soon 'after the down stroke commences in the cylinder, the exhaust port 16 passes. the 85 packing rings 33,- so that the combustion cylinder is closed, and the transfer valve is ,also then closed, and further compression then takes lace in the combustion chamber. At the sa'meitime suction is created in the intake chamber, causing the valve 15 to open and a mixture of combustible gases to insteadof using the crank casing for the compressionchamber, said gases do not come in contact with lubricating oil, and the lubrication is no degree affected by saidgases. There is less liability of the engine, being damaged b an efplosion, as, for'instance, by a cylin er he 'blowing.ont,since the 7 force of the explosion takes place between the piston 20 and-the stationary abutment 33 injthe form-of a piston.

. I claim:-

. '1. In an internal combustion engine, the combination of a cylindrical casing, a piston fitting closely within and reciprocating in port for the products of combustion.

exhaust port always open tothe atmosphere said casing, a cylindrical extension from said piston, a stationary abutment within said extension provided with suitable laterally located supports, a cross-head centrally connected to said extension at the side of said abutment remote from said piston, a

shaft, a crank thereon, a pitman connected to said crank and cross head, means for admitting combustible mixture to the s ace between said piston and easing, a Va ve permitting said mixture to pass from said ,space to the space between the piston and theabutment, and means within said latter space for igniting said combustible mixture, said extension having an exhaust port for the prodnets of combustion.

2. In an internal combustion engine, the combination of a c lindrical casing, a piston fitting closely wit in andjreciprocating in said casing, a cylindrical extension from 35 said piston, a stationary abutment within said extension providedwith-suita'ble later ally located supports, a cross-head centrally con ected to said extension at the side of said abutment remote from said piston, a 9 shaft, a crank thereon, 'a pitman connected to said crank and cross head, means for admitting combustible mixture to the space between said piston and easing, a valve In said 1 piston permitting said mixture to ass from said space to, the space between t e piston and the abutment, and 'means within said latter space for ignitin said combustible mixture, said extension Iraving an exhaust 3. In an internalcombustion engine, the combination of a oylindrical'casing, a piston fittin closely within and reciprocating therein, a cylindrical extension, a stationary abutment within said extens on provided with. suitablelaterally located supports, a

cross-headcentrally connected to said extension at the side of said abutmentremote from said piston, a shaft, a crank thereon, a pi'tman connected'to said crank and, crossead, means for admitting combustible mixtureto' the space between .said'pist on and casing, a valve in said piston permitting said mixture to pass from said space to the V space between the piston and the abutment, and means within said latter space for ig'niting said combustible mixture, said extension having an exhaust ort for the products of combustion, and sai casing having a'second with Wl'llCh the first-named port is adapted to register in the movement of the piston. Y

4.. In an internal combustion engine, the combination of acylindrical casing, an exterior casing forming with the first-named casingv awater jacket, a piston fitting closely within and reciprocating in said cylindrical casing and having an opening therethrough, said piston having an extension, an abut-- ment forming with said extension and piston 130 a chamber, the cylindrical casing having'in its end an inlet opening into the space between said'end and the piston, valves for controlling both of said openings, said pis- 5 ton being provided with an extension, a

cylindrical abutment around which said extension reciprocates, laterally located supports for said abutment, a shaft, a crank on said shaft, a pitman connected thereto, a

10 connection between the pitman and the eX- tension. passing between said supports, and a spark plug supported by said abutment, said extension having an exhaust port.

In testimony whereof I have hereunto setmy hand in, the presence of two subscribing 15 witnesses.

' EVERETT R. BURTNETT. Witnesses: FRANCIS M. WRIGHT,

D. B. RICHARDS. 

